I did not try to crack LTSB, but I think that it's similar to other Windowses. You're downloading MSDN iso from torrents (which you can verify by checksumming and googling), you're installing fake license server somewhere and you're activating your copy with that fake license server. No need to crack or run anything and fake license server is open source, so you can even compile it yourself and run from VM or VPS or whatever.
I wouldn't even call that stealing, as many folks legitimately want stable Windows and MS does not want to sell LTSB to them.